The present invention relates to the technical field of medical instruments for spinal surgery. Disclosed is a high strength bone screw seat, comprising a screw seat main body (1) and a fastening plug screw (2). An external stopper (4) protruding upward is provided at a position 0.2-0.8 times the thread height from the thread crest to the thread root on an upper side (3) of an external thread on the fastening plug screw (2). An internal stopper (6) protruding downward and cooperating with the external stopper (4) is provided at a position 0.8-0.2 times the thread height from the thread crest to the thread root on a lower side (7) of an internal thread on an inner side of an upper portion of the screw seat main body (1). In an axial cross section of the screw seat main body (1), a section line of the upper side (8) of the internal thread on the inner side of the upper portion of the screw seat main body (1) forms an angle of 30° to 75° with the axis of the screw seat main body (1). In the axial cross section of the fastening plug screw (2), a section line of the lower side (5) of the external thread on the fastening plug screw (2) forms an angle of 30° to 75° with the axis of the fastening plug screw. The high strength bone screw seat has a simple structure and good fastening effect. Furthermore, the screw wall is unlikely to expand and open, the screw thread is unlikely to break, and the high strength bone screw seat is highly safe.La présente invention concerne le domaine technique des instruments médicaux pour une chirurgie rachidienne. Linvention concerne un siège de vis à os à haute résistance, comprenant un corps principal de siège de vis (1) et une vis de rebouchage de fixation (2). Une butée externe (4) faisant saillie vers le haut est située au niveau dune position 0,2 à 0,8 fois la hauteur de filet allant de la crête de filet à la base de filet sur un côté supérieur (3) dun filet externe sur la vis de rebouchage de fixation (2). Une butée interne (6) faisan
